Well drill



l. J. IVICCULLOUGH.

WELL DRILL.

APPLICATION FILED IAN. Io,` 192|.

] A24,66 Patented Aug. l, 1922.

lll,

IRA J. MoC'ULLOUGI-I, 0F TUCSON, ARIZONA.

WELL DRILL. i

Specification of Letters Patent.

Patented Aug. i, 1922..

Application filed January 10, 1921. Serial No. 436,118.

To all wiz-0my t may concern Be it known that l, IRA J. MoCULLoUsi-I, a citizen of the United States, residing at Tucson, in the county of Pima, State of Arizona, have invented new and useful Improvements in lVell Drills, ot which the following is a specification.

My invention relates to well drills, and more particularly to drills of the rotary type adapted to be operated by the well casing, which is rotated in the usual manner by mechanism located on the surface of the ground above the well; and where the drillings areremoved by means of hydraulic pressure. 1 y

The object of my invention is to provide a drill comprising suitable bit members, which may be conveniently and expeditiously collapsed, and placed in operable position below the lower end of the well casing from the surface of the ground, and connected thereto, as well as removed therefrom without removing the casing from the well.

Another object of my invention is to provide a drill of the t-ype above described which will be simple and durable, and which may be quickly released from engagement with the well casing and drawn to the top of the well when production is encountered, without removing the casing from the well.

Other objects will appear in the following description, will be pointed out in the claims and will be embodied in the accompanying drawings, in which:

Fig. 1 is a vertical section through a well and well casing, showing my improved drilling apparatus, which is also shown in section, applied thereto as it would appear when in operation.

Fig. 2 is a similar view showing one step in the operation of removingthe drillingbits from the casing.

Fig. 3 is a transverse section taken on the line 3 3 of Fig. 1, viewed in the direction indicated by the arrows.

Fig. 4 is a transverse section taken on the line 4-4 of Fig. 1, viewed in the direction indicated by the arrows.

Fig. 5 is a side view of the lower end of the well casing showing the bit members in engagement therewith.

In carrying out my invention, 10 represents a well and 11 a well casing inserted therein. The casing 11 is adapted to be rotated from above the well in the usual manner by apparatus (not shown), and is also provided with the usual top cap and water pumping mechanism (not shown).

An annular sleeve 12 is adapted to fit into `the. casing 11 and to slide upwardly and downwardly therein, said sleeve having a bore of a smaller diameter at its top than at its bottom, thus forming an inclined wall therein. Secured to sleeve 12 by means of the screws 13, is a vertically disposed bar 14, which is arranged diametrically across said sleeve and extends both upwardly above and downwardly below the same. The lower end of bar 14 is enlarged as at 15, and is provided with tapered opposite sides as at 16,. and a cutting point 17. The extreme upper end of bar 14 is provided with a collar 18, which forms a shoulder 19, said collar being provided with an eye 20, to which a lowering` cable 21 is attached. The bar 14 is provided with the wedge portion 22 at a short distance above the top of sleeve 12. 'Arranged on opposite sides of the bar 14 andY adapted to pass through the bore of sleeve 12 are the bars 23 and 24, which are rounded on their outer surfaces to t the bore of said sleevefwhen in operative position, and are flat on their inwardly opposed surfaces, said flat surfaces being provided with the vertically disposed grooves 25 through which the water under hydraulic pressure may lbe admitted to the bottom of the well. The flat surfaces of bars 23 are also provided with the cut-away portions 26 adapted to accommodate the wedge 22 when said bars are in an inoperative position.

The lower end of casing 11 is provided with an extension member 27 of somewhat greater thickness than said casing, and formed in the lower end of said extension member are the notches 28 into which lugs 29 formed on shoulders 30 adjacent the lower ends of bars 23 and 24 are adapted to engage. The lower ends of bars 23 and 24 flare outwardly below the shoulders 30 to form the under cutting jaws 31.

The upper end of cable 21 is attached to the casing cap (not shown) in the usual manner, and attached also to said cap is a depending cable (not shown) which is bifurcated at its lower end to form the cables 33 and 34, which are attached respectively to the upper ends of bars 23 and 24, as clearly shown in Fig. 1 of the drawings. The upper ends of bars 23 and 24 are provided with the outwardly projecting flanges 35 adapted to engage with the inner wall of casing 11.

In Fig. 1l oi the drawings, the cutting jaws or bits 31 and the cutting point 17 are shown in operative position. When in this position it will be seen that the bar members 23 and 24 are forced outwardly by mea-ns ofv gagement with the side wall of the casing 11 by the wedge 22. By this arrangement it will be obvious that the shoulders 30 will receive the downward thrust of the casing 11 and that when said casing is revolved, the jaws 31 and cutting point 17 will also be revolved tov perform their functions.

'IV hen it is desired to remove the bit and othermembers from the casing l1, said casing is elevated l'or a short distance, as shown in Fig. 2 of the drawings, the bars 23 and 24 are then drawn upwardly by means of the cables 33 and34 until the lugs 29 engage with'the lowerend of sleeve 12. During this movement,v the jaw members 31 'are lorced inwardly toward each other by means of the upper edge of the bore in sleeve 12 and are contracted sufticientlyso that they will pass readily through the bore of casing 11. A continued upward pull on cables 33 and 34 will 'cause the jaw members 31, as well as the sleeve 12 and the bar 14 to be drawn readily out of the casing. It will be obvious that by reversing the above recited operation that all of the members may be as readily inserted into lthe casing into operative position without removing said casing from the well.

By the foregoing description of construction and mode of operation it will be seen that I have provided a drill which may be easily and quickly inserted into a rotary casing and locked thereto, as well as withdrawn from the same without removing the casing from the well.

What I claim is:

1. The combination with a rotary well casing, of a sleeve mounted in said casing, a pair of oppositely disposed bars provided with cutting jaws at their lower ends mount ed in said sleeve, a' barprovided with a wedge member at its lower end interposed between said first mentioned bars and attached to said sleeve, means forlocking said jaws to said rotary casing, and means 'for independently reciprocating said sleeve and said first mentioned bars.

2. The combination with a rotary well casing, of a sleeve mounted in said casing, a pair of oppositely disposed bars provided with cutting jaws at their lower endsmounted in said sleeve, means for expanding said cutting jaws to extend beyond the outer periphery of said casing, and means for locking said jaws to said rotary casing.

In witness that I claim the foregoing I have hereunto subscribed my name this 26th day of November, 1920.

IRA J. MoCULLOUGrI-I. 

